C# dynamic data display - update LineGraph

Question

In my XAML file, I create a ChartPlotter then I create in c# my LineGraphs and attatch them to my ChartPlotter. I tried to find a way to update these LineGraphs after their creation, but it always failed.

The only solution I found, is that I delete all LineGraphs , re-create them with new values and finally link them to my ChartPlotter.

How can I update LineGraph ?

for (int i = 0; i < lgs.Length; i++)
            if (lgs[i] != null)
                lgs[i].RemoveFromPlotter();

PS : lgs is my LineGraph array.

Answer 1

To update your LineGraphs, you have to use the ObservableDataSource object instead of the CompositeDataSource. With this object, you can use the method AppendAsync().

public partial class MainWindow : Window
{
    public ObservableDataSource<Point> source1 = null;

    public MainWindow()
    {
        InitializeComponent();
        this.Loaded += MainWindow_Loaded;
    }

    private void MainWindow_Loaded(object sender, RoutedEventArgs e)
    {
        // Create source         
        source1 = new ObservableDataSource<Point>();
        // Set identity mapping of point in collection to point on plot
        source1.SetXYMapping(p => p);

        // Add the graph. Colors are not specified and chosen random
        plotter.AddLineGraph(source1, 2, "Data row");

        // Force everyting to fit in view
        plotter.Viewport.FitToView();

        // Start computation process in second thread
        Thread simThread = new Thread(new ThreadStart(Simulation));
        simThread.IsBackground = true;
        simThread.Start();
    }

    private void Simulation()
    {
        int i = 0;
        while (true)
        {
            Point p1 = new Point(i * i, i);
            source1.AppendAsync(Dispatcher, p1);

            i++;
            Thread.Sleep(1000);

        }
    }
}

All you want is in the while of the method Simulation.

source1.AppendAsync(Dispatcher, p1);